New Delhi, Jan. 13 -- US President Donald Trump has threatened countries who trade with Iran, putting at risk the trade relations of Tehran with several countries including India and China.

Trump posted on social media on Monday that the new duty would be "effective immediately," but did not provide any details about the scope or implementation of the charges.

"Any Country doing business with the Islamic Republic of Iran will pay a Tariff of 25% on any and all business being done with the United States of America. This Order is final and conclusive," he said.

Trump's latest tariff blow has the potential to disrupt some of the major global trade routes, including India's partnership with Iran. New Delhi has been a major trading partner ...